9. shot (n.) a consecutive series of pictures that constitutes a unit of action in a film
The vacuum level is determined by the pressure differential between the evacuated volume and the surrounding atmosphere. Several units of measure can be used. Most refer to the height of a column of mercury â usually inches of mercury (in.-Hg) or millimeters of mercury (mm-Hg).
How much hold-down force is applied to the material can be calculated by reading the vacuum level gauge, multiplying that numeral by surface area of the material (sq.in.) and multiplying that by 0.5. For example, let's look at a gauge that reads 22 Hg for a material workpiece that is 24 square (576 sq.in.).2) When we have a box that has no air in it; i.e., almost complete vacuum, the top and all other sides of the box are being loaded with 15 pounds of pressure on each square inch of surface. If the top of the box is 6 x 6 then there is. 6 x 6 x 15 = 540 pounds of load evenly distributed on the surface.